--- Julia, what were you doing when Anna called you? --- I ________ my housework and was starting to take a bath.
_________she first heard of the man referred to as a specialist.
.All this_________ that knowledge comes from practice.
.The petrol tank is empty.I _________it up before we left home.
Driving a car is not as difficult as you imagine,if you_________ the rules.
When Mr.Jones gets old,he will _________ over his business to his son.